Hello Susan,
Take the stop motion wheel off again and you will see the three pronged washer, take it off and put it back in a different position, put the stop motion wheel back on again finger tight and tighten the small screw and try, if dtill not joy put the washer in a different position again, you can turn the washer upside down as well.
Ken
drivewithken@blueyonder.co.uk, January 2008